Shiva Purana
प्रणवं द्वादशावृत्त्वा संजप्य प्रणमेत्ततः ॥ दिग्विदिक्क्रमतो दद्याद्ब्रह्माद्यम्प्रणवेन च ॥ ६५ ॥
After repeating the Praṇava twelve times they shall again make obeisance. To every quarter and interstice food offering shall be offered with Praṇava.
english translation
praNavaM dvAdazAvRttvA saMjapya praNamettataH ॥ digvidikkramato dadyAdbrahmAdyampraNavena ca ॥ 65 ॥
hk transliteration by Sanscript